MULTIPLE ACCESS METHOD IN DIRECT DIFFUSION COMMUNICATION SYSTEM AND MULTIPLE ACCESS APPARATUS FOR USE THEREIN

PURPOSE: To provide a multidimensional connection method for preventing a perspective phenomenon with simple constitution with respect to the multidimensional connection method in a direct diffusion communication system. CONSTITUTION: The multidimensional connection method between a base station and a moving station is to set peculiar identification frequencies in the respective moving stations which are multidimensionally connected to the base station, to modulate a carrier frequency with the identification frequency, to mix it with base band data and to execute communication. A demodulation means is composed of a PN code generator 64 outputting a PN code corresponding to the moving station, a carrier modulation generator 66 modulating the carrier frequency with the identification frequency corresponding to the moving station and outputting it as the carrier fcu+fid, a mixer 68 mixing the output of the PN code generator 64 and the output of the carrier modulation generator 66 and outputting it as a demodulation carrier Y(t), a mixer 70 mixing and outputting a signal R(t) and the output of the mixer 68, an integrator 72 integrating the output of the mixer 70 and a judgment circuit 74 judging the output of the integrator 72 and restoring it into a digital signal.